A president needs empathy and emotional intelligence, so that he can prevail in political dealings with his own party and the opposition in Washington, and in face-to-face negotiations with foreign leaders, who otherwise will go away saying that this president is “weak” and that the country’s leadership role is suspect. He needs to be confident but not arrogant; open-minded but not a weather vane; resolute but still adaptable; historically minded but highly alert to the present; visionary but practical; personally disciplined but not a prig or martinet. He should be physically fit, disease-resistant, and capable of being fully alert at a moment’s notice when the phone rings at 3 a.m.—yet also able to sleep each night, despite unremitting tension and without chemical aids.

Ideally he would be self-aware enough that, in the center of a system that treats him as emperor-god, he could still recognize his own defects and try to offset them.